Cannot Boot Acadia with New Image

I am trying to boot the Acadia from either image (SD boot or eMMC boot) using the instructions here.

1. SD Boot

Booting from SD card works initially but hangs with the message:

mmc2: host does not support reading read-only switch. assuming write-enable.

mmc2: new high speed SDHC card at address dfc7

mmcblk0: mmc2:dfc7 SE08G 7.2 GiB

mmcblk0: p1

2. eMMC Boot

Nothing happens. As it turns out, the hardware version I have (Acadia 1 V3.0) does not have configuration switches (the DIP switches just above the CPU are not populated). This makes following the guides (specifically the parts about setting the DIP switches to configure eMMC boot) a little difficult.